MONTHLY SUMMARY 



July, 1946 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.29, 16th 



Minimum ^ 29.79, 12th, 20th 



Mean semi-daily 30.040 



Range 0.50 



Air Temperature, in degrees F. 



Highest 

 Lowest . 



-95, 19th 

 .46, 16th 



Mean 70.2 



Range — .49 



Highest mean daily 81.5, 20th 



Lowest mean daily 62.0, 16th 



Mean maximum 82.3 



Mean minimum 58.0 



Greatest daily range 39, 18th, 19th 



Least daily range 10, 22nd, 23rd, 31st 



Precipitation, in inches 



Precipitation 5.30 



Snow — 



Maximum precip. in 24 hrs 3.46, 23rd 



Number of days with .01 or more. 6 



Wind, in miles 



Total movement 3229 



Greatest daily movement .204, l5th 



Least daily movement -.48, 28th 



Mean hourly velocity 4.3 



Maximum velocity 28, 30th 



Wind, direction 



Prevailing direction SW 



North, days 1 



Northeast, days . 



East, days ....1 



Southeast, days 11 



South, days 3 



Southwest^ days _^ ... 2 



West, days 2 



Northwest, days ..1 . 11 



Weather 



Mean relative humidity, percent 69.2 



Mean cloudiness, percent 53 



Number of clear days 21 



Number of fair days 4 



Number of cloudy days 6 



Number of hours bright sunshine 319 



Percent of possible hours of bright 

 sunshine 69 



Thunder and lightning _....30th 



Normal 



30.27 



29.59 



29.96 



0.68 



93.9 



46.4 

 70.8 

 47.7 



4.10 

 11 



3422 



4.6 

 28.7 



SW 



68.4 

 50.9 

 10 

 14 



7 



268 



58 



Extremes 



30.50, 1892 

 29.27, 1932 



0.97, 1892; 0.47, 1938 



104, 1911 



40, 1890, 1898 



74.7, 1921 ; 66.3, 1891 



14.51, 1897; 0.70, 1929 

 20, 1915; 4, 1924 



5097, 1909; 1109. 1894 

 44, 1936 



70, 1943; 31, 1924 

 22, 1923; 0, 1915 

 24, '09, '21 ; 5, '89, '23, '28. 

 '36 



18, 1889; 0, 1910 

 371, 1910; 180, 1931 



Note — The first column in the above summary gives observations made during 

 the month. The second column gives the averages based on observations made 

 from 1889 to 1938, except that humidity records are based on observations made 

 from 1929 to 1938. The third column gives extremes observed from 1889 to 1945. 



